Concentrating-table.



A. R. WILFLEY.

GONGENTRATING TABLE.

APPLICATION mum MAY 15, 1903.

7 970,283. Patented Sept. 13,1910.

WTW

3 SHEETS-SHEET 1.

'A. R. WILELEY. OONGENTRATING TABLE. APPLICATION IILBD MAY 15, 1903.

Patented Sept. 13,1910.

3 SHEETS-SHEET 2.

.1. 5; M i g A. R. WILPLEY.

GONGENTRATING TABLE.

APPLIUATION IILBD MAY 15, 1803.

Patented Sept 13,1910.

3 sHnnTs-s'nnm a.

nueul'wz @Nozucq was? a UNITED, STATES PATENT OFFICE.

An'rmm E. WILFLEY, or nEnvEa, COLORADO, assirnoa TO THE MINE AimsmEL'rEn H SUHLY comramr; or pan-van, conoaano, a coaroaa'rron'.

concfiirma md-rnu.

Specification of Letters ratent.

Patented Sept. 13, 1910.

Application filed may 15, 1908. serial H0. 157,287.

useful Improvement in Concentrating-Tables, of which the following is aspecifica- 7 tion.

My invention relates to an improvement in concentrating tables, and itis of the gen-v eral type commonly known as a vanner,

in which the concentration takes place on a moving belt or surface; andthe primary object of my present invention is to treat tailings fromtables of the class known as the iWilfley or tables which move the pulpalong their surface by inertia. rWith this class of table the materialof greatest specific gravity, and also material moved the most'rapidlybytheir own inertia are given the advantage. This results in catchingpractically all of the coarse mineral, most of the fine, and somecoarsegangue, that is to say, the gangue which it does catch is allcoarse because it travels the fastest by inertia. A certain amount ofvery fine mineral having specific gravity to settle, but not the shapeor size to move forward is finally disturbed and lost in the tailings.Now, the present type of belt machine works in the opposite direction,and fine material having a specific gravity to settle, but not the sha eor size to progress by inertia, will sett e upon the surface of thecanvas or other material, while the larger, lighter particles will beprogressed over it. With the Wilfley type of table to prevent suchgrains from. accumulating on the table, the table must be runwith astrong motion to susend them so that the table will not become oadedwith such minerals, but with the present belt machine, I propose to runit at just such speed as will allow such a par ticles of fine ganguewhich will not move 'by inertia.

In addition to the foregoing, my invention contemplates a moving,surface with a secondary movement whose tendency is to secured thereto.-

belts 6, 6, are carried over these sprocket progress the material beingtreated in another direction. Y

M invention further consists in certain nove features of constructionand combinations of parts which will be hereinafter described andpointed out in the claim."

In the accompanying drawings, Figure 1 is a plan view, Fig. 2 is a viewin side elevation, Fig. 3 is a transverse vertical section, and Figs. 4and 5 are detail views of the troughs.

In the particular exemplification of my invention illustrated, Arepresents the base or framework of the concentrator, and B, is

the table frame, preferably supported on the base by means of rockers L,L, beneath which latter are set screws 2, 2 adapted to raise 'or lowerthe rockers, to tilt or level the table. This table frame in actualconstruction is intended to be about seven feet wide by twelve feet inlength, and is built up of suitable stringers and cross ties, on top ofwhich is screwed a deck of narrow boards to afford a smooth surface.Shafts 4, 4, are journaled in the opposite ends of the table frame andsprocket wheels 5, 5 are Sprocket chains or link wheels and these chainscarry a series of troughs 7, 7 which are disposed side by sideand'transversely of the table and which, together with the chains,constitute an endless belt, which moves slowly over the deck carried bythe sprocket wheels at each end. These troughs are preferably about teninches wide and seven feet in length and are each made of two strips ofwood a, a, say an inch by an inch and a half in cross section and sevenfeet in length, with slats of wood I), b, a quarter of an inch thick bythree inches wide and ten inches long, nailed across them, and thebottom of each trough is lined preferably with canvas 0. The moving beltthus constructed and constituted rests upon this deck or surface and isdragged along on it without any rollers at the ends, the sprocket wheelsperforming The underside the function of the rollers. of the belt issupported on two stringers which are fastened to the shaking table frameso that even this portion is not supported on rollers and the entirebeltis carried by the chains. In the construction shown a differentialtoggle movement is set a box 21 for wash water.-

ing closed at this side of the tab e, the

- stroke is first quick and then retarded thus aiding this outwardprogressive movement of the material... I

On one end of the main drive shaft 10,

the worm 11 is located, which worm en ages a worm gear 12 on the countersha I 13 whichextends at right angles to the main drive shaft 10, andp'aral el with the belt shafts on the table or shaking frame. Thiscounter shaft 13 and one of the shafts which carries the belt are.connected bi a chain belt 15, which extends over sproc .16 and 17, keyedto'the counter shaft and belt shaft, respectively, which im arts slowand constant movement to the mam belt, the chain drive allowing thetable a reciprocating motion while the counter shaft remains stationary.

Returning to the troughs, it may be added that they are set practicallylevel, or with sli ht inclination toward the open end. The

up is fed along) the side for about half the length of the ta le in thepulp box 20, the balance of the distance bei supplied with he trou hsbewater necessarily flows toward the other side and hence theprogression of movement being in the same direction, the gangue iscarried that way. Thus it will be seen that large pieces of Igangue, aslarge as ones fist of the trough toward the ct wheels ling witnesses.

amass mi ht be. progressed over the side of the tab e, while extremelyfine particles of mineral would be carried along by the moving surfaceof canvas or what not. And this is in contradistinction to othermachines in which the gangue is removed by a current of water or b somemechanical device for scraping it o of the top, whereas in my inventionthe gangue is progressed, by 1ts inertia over the top so that a veryslight current to the water is necessary.

As a simple "means for insuring the removal of the concentrates from thetroughs, a concentrate box 25 is located beneath the discharge end ofthe table and a spray pipe 26 .just above this box discharges water intothe inverted troughs as they pass aboveit,

thus washing out all of the mineral, which grops into and is caught bythe concentrate Having fully described my invention what I claim as newand desire to secure by Letters Patent, is

In combination, a slimes concentrating belt composed of transverselydisposed trough sections open at one end, means formoving the belt inthe direction of its length, means for imparting reciprocation to thebelt initially slow and increasing to fast in the direction toward theopen ends of the troughs, and initially fast and decreasing to slow inthe reverse direction, means for feeding slimes to the heads of thetroughs, and means for feeding dressing water to said troughs.

In testimony whereof, I have signed this specification in the presenceof two subscrib- ARTHUR R. WILFLE'Y.

Witnesses: p

E. B. BADGER, M. A. Dmsmonn.

